The rating of the Pritikin principle diet is on two levels and is based on the clinical evidence so far received for this diet from all the clinical studies so far conducted:

“Rating as a short term diet – 9.5/10”

“Rating as a long term diet – 7.5/10”

REFERENCES

1. The Pritikin diet is an excellent diet for the short term. It ensures that there is a high intake of fruits, vegetables, grains and restricts or bans all processed foods. This diet adheres to almost all of the principles of healthy eating recommended by nutritionists all around the world and it is suitable for vegetarians.
2. While the Pritikin diet is entirely suitable for the short term, it needs more fat in the diet to make it a perfect diet, as it’s current recommendation of only 10% daily fat intake may be insufficient for absorbing the fat-soluble vitamins (A, D, E, K) which could cause some deficiencies and potentially health problems